Modding can add weapons, turn weapons that are single-wielded into dual-wielded weapons, such as the Covenant Energy Sword, can make a player jump incredible distances and in some cases, break the game or map barrier. Creating new compound vehicles by 'welding' two or more existing vehicles together.Make enemy vehicles appear in different levels.Make new standard weapons (Enforcer Needler, Scarab Gun, Prophet Beam, etc.).Change the type of enemy (Grunts to Hunters, Elites to Prophets, etc.).